extractMaterializer

Signature

def extractMaterializer: Directive1[Materializer]

Description

Extracts the Materializer from the RequestContext, which can be useful when you want to run an Akka Stream directly in your route.

See also withMaterializer to see how to customise the used materializer for specific inner routes.

Example

val route =
  path("sample") {
    extractMaterializer { materializer =>
      complete {
        // explicitly use the `materializer`:
        Source.single(s"Materialized by ${materializer.##}!")
          .runWith(Sink.head)(materializer)
      }
    }
  } // default materializer will be used

// tests:
Get("/sample") ~> route ~> check {
  responseAs[String] shouldEqual s"Materialized by ${materializer.##}!"
}